PartyMeasure
Cake Serving Calculator
Estimate how many cake portions you need and a practical round-cake size.
Adults: 10; children: 10; regular slices; extra: 0%
Your estimate
Suggested cake
8-inch round cake
20.3 cm round cake
Required servings
20
Cupcake equivalent
20
1 cupcake per serving
Cake serving sizes vary by height, shape and cutting method. This is a simple planning estimate.
Planning estimate
PartyMeasure provides planning estimates only. Actual needs vary by guest appetite, menu, event length, serving style and local conventions.
How this estimate works
Each adult and child counts as one serving. Add the selected 0%, 10% or 20% extra and round up. Regular capacities are 10: 6-inch round cake; 20: 8-inch round cake; 30: 10-inch round cake; 45: 12-inch round cake; 60: Two 10-inch round cakes; 80: Two 12-inch round cakes. Small slices increase each capacity by 25%, rounded down. One cupcake equals one serving. Metric sizes convert inches × 2.54.
Practical planning tips
Confirm the cake's height and cutting plan with your baker. Use the recommendation as a starting point, especially for unusually tall cakes or different shapes.
Common questions
Do children need smaller slices?
This tool counts adults and children equally. Small party slices apply to the whole cake, not only to children.
Why do cake serving estimates vary?
Height, shape and cutting method change the portions a cake provides.
Can I use cupcakes instead?
Yes. The cupcake equivalent is one cupcake per required serving.
Planning another part of the party?
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